Carmilla is a tall, light gray-skinned demon who sports long white hair with black streaks. Her hair is usually kept into two large horns by thin, ballerina-like black ribbons, but when she lets her hair loose, it reaches down to her ankles and is slightly messy. Carmilla appears to be largely professional, though she can lose her temper, especially when Zestial is insulted or her family is in danger. Zestial claims that losing her temper is usually very unlike her.